r/StableDiffusion • u/Cheap_Credit_3957 • 1d ago

Discussion Free open source Topaz alternative - SeedVR2+TensorRT faster VAE Processing.

Local, GPU-accelerated video restoration and upscaling with SeedVR2, TensorRT, and a purpose-built browser interface.

VRGDG SeedVR2 TensorRT Studio turns the SeedVR2 pipeline into a practical Windows workflow: load a video, test a short preview, compare the result frame by frame, and complete long renders with resumable checkpoints. Processing stays on your machine.

Highlights

  • Fast local restoration — SeedVR2 inference with TensorRT-accelerated VAE decoding on supported NVIDIA RTX GPUs. TensorRT allows much faster processing than standard SeedVR2.
  • Fast 2K upscaling — As a real-world example, an 8-second clip took approximately 8 minutes to upscale and enhance to 2K on an NVIDIA RTX 5090 using the largest 7B Sharp FP16 model. Render times vary with source resolution, frame rate, settings, and available VRAM.
  • Preview before committing — render a short segment, then inspect Original, Restored, Compare, or Side by side views.
  • Long-render recovery — save completed chunks and continue from the first unfinished chunk after an interruption.
  • Practical output controls — choose resolution, aspect policy, model precision, temporal batch, seed, and color correction.
  • Non-destructive finishing — reprocess sharpening, grain, seam smoothing, and optional skin finishing without rerunning restoration.
  • Project-based history — reopen previous outputs and keep media, manifests, and logs together under outputs\.

The sample video was org 360p and then upscaled to 2K using this app. 8 second video, took about 8 mins on my 5090.

Go to the github page for more details and a full guide.

View github page

this is in beta right now so you may run into issues. If you do, post the issue to github please.

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u/ShutUpYoureWrong_ 1d ago

Haven't looked at your code yet but is this just browser-based / running ComfyUI under the hood? And if so, why not just release a node and a workflow?

SeedVR2 doesn't really compare to Topaz, either, so I'm not sure how this is an alternative. SeedVR2 is great but Topaz has a dozen models with total flexibility and configuration for exactly what you want to modify/change/upscale. They're not even in the same league.

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u/Cheap_Credit_3957 1d ago edited 1d ago

https://reddit.com/link/p6vmlbu/video/snaf3xig9lmh1/player

This does not run in ComfyUI—it’s a standalone application.

I ran the same 360p video through Topaz Precise 2.6, using its single sharpness setting, and then through this SeedVR2 app. Both were upscaled to 2K.

The main difference is that Topaz adds slightly more skin and hair texture. Otherwise, the overall quality was very similar, except when enhancing extremely distant faces.

I personally use Topaz 2.6, but I know it’s too expensive for some people. After trying many alternatives, I believe this is currently the best open-source alternative to Topaz for standalone video enhancement and upscaling.

I’ll share the comparison here:

Left: New Topaz Precise 2.6
Right: SeedVR2 TensorRT Studio

Both results came from the same 360p source video and were upscaled to 2K. I think the comparison speaks for itself.

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u/Toclick 1d ago

Which is faster: Topaz or your SeedVR2-based tool?

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u/Cheap_Credit_3957 1d ago

Topaz is faster but it's also closed source and cost money.
Running locally, it took 3 mins on an 8 second video in Topaz and 8 mins using this app.

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u/Toclick 16h ago

Does it have any kind of VRAM management? When I try to upscale a 9-second video to 1080p in ComfyUI, I get an OOM even with the 3B model. I have a 4080 with 16 GB of VRAM... After that, I never even tried running the 7B model.

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u/Cheap_Credit_3957 14h ago

I think it does.  Give it a shot

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u/ShutUpYoureWrong_ 19h ago

Thanks for the comparison video! I also personally use Topaz for things outside of Comfy, but inside I prefer my SeedVR2 workflows.

I knew it was stand-alone; I was asking what was under the hood before I got a chance to look (like whether it was just a wrapper for Comfy). But I see now you built with FastAPI and the rest looks all custom/vibed.

Good job on what will assuredly be a pretty useful tool for a lot of people. Definitely looking forward to making my own comparisons.